C＃：System.Net.WebException：基礎連接已關閉

我有以下代碼：C＃：System.Net.WebException：基礎連接已關閉

String url = // a valid url 
String requestXml = File.ReadAllText(filePath);//opens file , reads all text and closes it 
byte[] bytes = System.Text.Encoding.ASCII.GetBytes(requestXml); 
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); 
request.Credentials = new NetworkCredential("DEFAULT\\Admin", "Admin"); 
request.ContentType = "application/xml"; 
request.ContentLength = bytes.Length; 
request.Method = "POST"; 
request.KeepAlive = false; 
Stream requestStream = request.GetRequestStream(); 
requestStream.Write(bytes, 0, bytes.Length); 
requestStream.Close(); 
HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
Stream responseStream = response.GetResponseStream(); 
return new StreamReader(responseStream).ReadToEnd();

在運行過程中，我發現了以下異常試圖讀取HTTPWebResponse：

System.Net.WebException：底層連接已關閉：接收時發生意外錯誤。
---> System.IO.IOException：無法從傳輸連接讀取數據：建立的連接被主機中的軟件中止。在System.Net.Sockets.Socket.Receive（Byte []緩衝區，Int32偏移量，Int32大小，以及在System.Net.Sockets.Socket.Receive中創建的連接已被您的主機中的軟件中止
SocketFlags socketFlags）
at System.Net.Sockets.NetworkStream.Read（Byte [] buffer，Int32 offset，Int32 size）
at System.Net.Sockets.NetworkStream.Read（Byte [] buffer，Int32 offset，Int32 size ）
在System.Net.PooledStream.Read（字節[]緩衝液，的Int32偏移的Int32大小）
在System.Net.Connection.SyncRead（HttpWebRequest的請求，布爾userRetrievedStream，布爾probeRead）

來源

2017-09-08 user1168608

https://stackoverflow.com/questions/21728773/the-underlying-connection-was-closed-an-unexpected-error-occurred-on-a-receiv – w0051977

@ w0051977我有已經看到這個線程，我已經設置request.keepAlive = false。那麼是否有必要重寫GetWebRequest（Uri uri）方法？ – user1168608

刪除Close（）方法並重試。您正試圖從您關閉的連接中讀取響應。 – jdweng

在閱讀之前不要關閉流。這應該工作：

String url = // a valid url 
String requestXml = File.ReadAllText(filePath);//opens file , reads all text and closes it 
byte[] bytes = System.Text.Encoding.ASCII.GetBytes(requestXml); 
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); 
request.Credentials = new NetworkCredential("DEFAULT\\Admin", "Admin"); 
request.ContentType = "application/xml"; 
request.ContentLength = bytes.Length; 
request.Method = "POST"; 
request.KeepAlive = false; 
using (Stream requestStream = request.GetRequestStream()) 
{ 
    requestStream.Write(bytes, 0, bytes.Length); 
    using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) 
    { 
     using (Stream responseStream = response.GetResponseStream()) 
     { 
      using (StreamReader streamReader = new StreamReader(responseStream)) 
      { 
       return streamReader.ReadToEnd(); 
      } 
     } 
    } 
}

來源

2017-09-09 16:59:04

C＃：System.Net.WebException：基礎連接已關閉

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